<!DOCTYPE html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<title>Grid</title>
	<link rel="stylesheet" href="../css/style.css">
	<script type="text/javascript" src="../../lib/paper.js"></script>
	<script type="text/paperscript" canvas="canvas">
		/////////////////////////////////////////////////////////////////////
		// Values

		tool.fixedDistance = 10;

		var values = { size: tool.fixedDistance };

		/////////////////////////////////////////////////////////////////////
		// Mouse handling

		var point, path;

		function getPos(pt) {
			return (pt / values.size).round() * values.size;
		}

		function onMouseDown(event) {
			point = getPos(event.point);
			path = new Path();
			path.strokeColor = 'black';
			path.add(point);
		}

		function onMouseDrag(event) {
			var p = getPos(event.point);
			if (point != p) {
				path.add(p);
				point = p;
			}
		}
	</script>
</head>
<body>
	<canvas id="canvas" resize></canvas>
</body>
</html>